. >>> also, new images of sandy's wrath. the hurricane famously crippled public transit. and now, we have new video showing it all happen. >>> and an incredible story from the storm zone. love letters wash ashore, discovered after 60 years. >>> good morning, everyone. a salute to american heroes has turned into a horrific accident scene at a railroad crossing in texas. with 4 people dead, and 17 injured. >> federal investigators have arrived in midland, hours after a freight train slammed into a parade float that was carrying wounded veterans. abc's larry jacobs reports. >> the trailer got hit by a train. we need as many units as you can. >> reporter: a parade float carrying wounded veterans to a banquet in their honor, was broadsided by a freight train. it happened at this railroad crossing in midland, texas. two 18-wheelers with flatbed trailers were carrying dozens of wounded warriors and their families. the first truck crossed the railroad tracks safely. but the second took the full force of the collision. >> saw the truck crossing the track. about halfway across, the